ADEMCO 678 Manuals

No. 678 DIGITAL COMMUNICATOR GENERAL INFORMATION: The 678 is an 8 channel digital communicator that transmits coded messages over ,the telephone system to a digital receiver located at a central monitoring station. Special leased lines are not required. (There is a 9th channel dedicated to user test and optional low ba=y reporting.) To accommodate various receivers, the 678 can transmit in three formats: I) Ademco (and Silent Knight), 2) Ademco High Speed or 3) Sescoa/Franklin/DCI. The 678 consi sts of a printed ci rcuit board chassis Bnd cover that may be in&a I led in any suitable enclosure, such as the Nos. 204 or 205 Cabinets, or the lower section of a No: 1023 or 1024 Alarm Processing Center’s cabinet. (Note: The upper section of a No. 1023 or 1024’s cabinet may be used as well, if the 678 is mounted behind or in lieu of the APC’s normal control chassis.) The 678 may be powered from a 6 or 12V. DC, filtered rechargeable, source [such as (for 6V): Ademco Nos. 492, 493-j. Caution: The Nos. 89 and 89-12 Energy Packs may not be used, nor may sources containing Ni-Cad batteries such as the Nos. 96, 97, 497. A comnon power supply from a control panel can be used, even with bells connected to the control (No. 1026 or 1028 series Alarm Processing Centers may not be used, as they conta i n ‘N i-Cad standby batteries 1. The 678 may be triggered by: I) Application (or removal) of 6-l2V. DC supplied from any alarm control (or other DC source), 2) Dry contact closure, 3) Dry contact opening. The 678 is easily programmed by the insertion of a PROM (Programmable ReadgnlY &emorYj Chip, such as the No. 691. PROM Chips can be programmed bv Ademco or (with the No. 690 Programmer) by the i nstal ler. The 678 has built-in line seizure and telephone line surge arrestors. Line seizure automatically disconnects all telephones in ttie premises on the same line with the communicator whenever the 678 is activated, to insure transmission without interruption. Surge arrestors help protect the 678 from’voltage surges on the telephone line. The 678 is compatible with the Ademco family of ancillary communicator accessories, including the following: Cat. No. Description 620’ Di rect Connect Cord 659 Line Fault Monitor 664 Digital Communicator Tester 674 Select-A-Line (two line select module) 675 Ground Start Module 676/677 Listen-in System 684 Remote Command Tone Responder 688 Opening/Closing Switching Module 689 AC Power/Telephone Line Fault Monitor 826 I Remote Buzzer 179 173 www.PDF-Zoo.com